Westinghouse DA-50 User manual

I
.
B
-
32
-
100
-
1
DESCRIPTION
•
INSTALLATION
*
MAINTENANCE
Low
-
Voltage
METAL
-
ENCLOSED
SWITCHGEAR
WESTINGHOUSE
ELECTRIC
CORPORATION
SWITCHGEAR
DIVISION
EAST
PITTSBURGH
,
PA
.
EAST
PITTSBURGH
PLANT
EFFECTIVE
AUGUST
,
1948
Printed
in
U
.
S
.
A
.
SUPERSEDES
I
.
B
.
5992
Courtesy of NationalSwitchgear.com

TABLE
OF
CONTENTS
DESCRIPTION
Part
One
Pages
6
-
22
*
-
Switchgear
Having
Types
DA
-
50
and
DA
-
75
Circuit
Breakers
Stationary
Structure
Removable
Element
Interlocks
Accessories
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Type
DA
-
100
Circuit
Breakers
Stationary
Structure
Removable
Element
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Type
DK
Circuit
Breakers
Interlocks
Inserting
the
Removable
Element
Removing
the
Element
Switchgear
Having
Types
DB
-
15
and
DB
-
25
Circuit
Breakers
Interlocks
'
Accessories
Inserting
the
Removable
Element
Removing
the
Element
7
7
9
10
10
10
13
13
13
15
15
.
16
16
16
16
18
18
18
i
19
20
21
RECEIVING
,
HANDLING
AND
STORING
Part
Two
Page
23
Receiving
Handling
.
Storing
.
.
.
23
23
23
INSTALLATION
Part
Three
Pages
24
-
27
Foundation
Placing
of
Stationary
Structure
Power
Connections
Ground
Connection
Control
Connections
Pre
-
operation
Checks
24
24
24
25
25
26
INSPECTION
AND
MAINTENANCE
Part
Four
Page
28
a
2
Courtesy of NationalSwitchgear.com

I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
LIST
OF
ILLUSTRATIONS
Page
Figure
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Op
-
erated
Circuit
Breakers
as
Removable
Elements
2
.
Low
-
Voltage
Switchgear
Installed
in
an
Outdoor Weather
-
proof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Out
-
door
Power
Center
3
.
View
of
Rear Bus
Compartment
4
.
Micarta
Bus
Supports
Arranged
for
One
Bus
Bar
per
Phase
5
.
Micarta
Bus
Supports
Arranged
for
Two
Bus
Bars
per
Phase
6
.
Micarta
Bus
Supports
Arranged
for
Three
Bus Bars
per
Phase
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
8
.
Removable Element
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
9
.
Compartment
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
10
.
Removable
Element
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
11
.
Compartment
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
12
.
Removable
Element
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
13
.
Levering
in
a
Type
DA
-
50
Manually
-
Operated
Removable Element
14
.
Placing
Removable
Element
in
Compartment
by
use
of
a
Hoist
.
.
Not
that
Rail
Extension
and
Lifting
Brackets
are
in
Place
15
.
Placing
Removable
Element
in
Compartmmt
Using
the
Handling
Carriage
16
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Open
Position
17
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Closed
Position
18
.
Removable
Element
for
Type
DA
-
100
,
4000
-
Ampere
Circuit
Breaker
19
.
Compartment
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
20
.
Removable
Element
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
.
21
.
Levering
in
a
Type
DK
-
25
Removable
Element
22
.
Compartment
for
Type
DK
-
25
Circuit
Breaker
23
.
Removable
Element
for
Type
DK
-
25
Circuit
Breaker
24
.
Switchgear
Containing
Types
DB
-
15
and
DB
-
25
Removable
Elements
25
.
Compartment
for
Type
DB
-
15
Circuit
Breaker
26
.
Removable
Element
for
Type
DB
-
18
Circuit
Breaker
27
.
Compartment
for
Type
DB
-
25
Circuit
Breaker
28
.
Removable
Element
for
Type
DB
-
25
Circuit
Breaker
29
.
Type
DB
-
25
Element
in
Position
for
Inserting
in
Compartment
30
.
Inserting
a
Type
DB
-
25
Removable Element
31
.
Metal
-
Enclosed
Switchgear
Prepared
for
Shipment
32
.
Dimensions
for
Locating
Stationary
Structure
33
.
Suggested
Methods
for
Fastening
Housing
to
Floor
Channels
6
6
7
7
7
7
8
8
9
9
11
11
12
13
V
.
^
13
14
14
14
15
18
16
17
17
18
19
19
20
20
21
21
23
24
25
3
Courtesy of NationalSwitchgear.com

I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
LIST
OF
ILLUSTRATIONS
3
Page
Figure
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Op
-
erated
Circuit
Breakers
as
Removable
Elements
2
.
Low
-
Voltage
Switchgear
Installed
in
an
Outdoor
Weather
-
proof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Out
-
door
Power
Center
3
.
View
of
Rear
Bus
Compartment
4
.
Micarta
Bus
Supports
Arranged
for
One
Bus
Bar
per
Phase
5
.
Micarta
Bus
Supports
Arranged
for
Two
Bus
Bars
per
Phase
6
.
Micarta
Bus
Supports
Arranged
for
Three
Bus
Bars
per
Phase
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
8
.
Removable
Element
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
9
.
Compartment
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
10
.
Removable
Element
for
Type
DA
-
50
Electrically
-
Operated
Circuit
Breaker
11
.
Compartment
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
12
.
Removable
Element
for
Type
DA
-
75
,
2000
-
Ampere
Circuit
Breaker
13
.
Levering
in
a
Type
DA
-
50
Manually
-
Operatea
Removable
Element
14
.
Placing
Removable
Element
in
Compartment
by
use
of
a
Hoist
.
Not
that
Rail
Extension
and
Lifting
Brackets
are
in
Place
15
.
Placing
Removable
Element
in
Compartmrnt
Using
the
Handling
Carriage
16
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Open
Position
17
.
Automatic
Shutters
in
a
Type
DA
-
100
Compartment
,
Closed
Position
18
.
Removable
Element
for
Type
DA
-
100
,
4000
-
Ampere
Circuit
Breaker
19
.
Compartment
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
20
.
Removable
Element
for
Type
DA
-
100
,
5000
-
or
6000
-
Ampere
Circuit
Breaker
.
21
.
Levering
in
a
Type
DK
-
25
Removable
Element
22
.
Compartment
for
Type
DK
-
25
Circuit
Breaker
23
.
Removable
Element
for
Type
DK
-
25
Circuit
Breaker
24
.
Switchgear
Containing
Types
DB
-
15
and
DB
-
25
Removable
Elements
25
.
Compartment
for
Type
DB
-
15
Circuit
Breaker
26
.
Removable
Element
for
Type
DB
-
18
Circuit
Breaker
27
.
Compartment
for
Type
DB
-
25
Circuit
Breaker
28
.
Removable
Element
for
Type
DB
-
25
Circuit
Breaker
29
.
Type
DB
-
25
Element
in
Position
for
Inserting
in
Compartment
30
.
Inserting
a
Type
DB
-
25
Removable
Element
31
.
Metal
-
Enclosed
Switchgear
Prepared
for
Shipment
32
.
Dimensions
for
Locating
Stationary
Structure
33
.
Suggested
Methods
for
Fastening
Housing
to
Floor
Channels
6
6
7
7
7
7
8
8
9
9
11
11
12
/
-
V
;
13
13
14
14
14
15
18
16
17
17
18
19
19
20
20
21
21
23
24
25
3
Courtesy of NationalSwitchgear.com

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Courtesy of NationalSwitchgear.com

I
.
B
.
32
-
100
-
1
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
/
Low
-
Voltage
METAL
-
ENCLOSED
SWITCHGEAR
This
instruction
book
has
been
prepared
to
familiarize
the
purchaser
'
s
engineering
and
operating
staff
with
the
low
-
voltage
(
600
volts
or
lower
)
metal
-
enclosed
switchgear
supplied
by
Westinghouse
.
The
information
con
-
tained
herein
should
be
carefully
studied
before
attempting
to
install
or
operate
the
equipment
.
Proper
installation
,
operation
and
maintenance
are
necessary
to
assure
continued
satisfactory
service
from
the
equipment
.
It
should
not
be
installed
in
places
where
it
will
be
called
upon
to
operate
at
voltages
or
currents
greater
than
those
for
which
it
was
designed
.
For
instructions
pertaining
to
a
particular
piece
of
apparatus
supplied
as
part
of
the
switchgear
equipment
,
refer
to
the
instruction
book
or
leaflet
ap
-
plying
to
that
particular
type
of
apparatus
.
Copies
of
the
applicable
publica
-
tions
are
furnished
along
with
this
book
for
each
switchgear
installation
.
Only
authorized
and
properly
trained
personnel
should
be
permitted
to
operate
or
handle
any
portion
of
the
switchgear
.
Caution
:
T
&
5
Courtesy of NationalSwitchgear.com

I
PART
ONE
r
5
t
»
FIG
.
1
.
Front
View
of
Indoor
Metal
-
Enclosed
Switchgear
Containing
Types
DA
-
50
,
DA
-
75
and
DA
-
100
Electrically
-
Operated
and
Type
DA
-
50
Manually
-
Operated
Circuit
Breakers
as
Removable
Elements
Low
-
voltage
(
600
volts
or
lower
)
indoor
and
out
-
door
metal
-
enclosed
switchgear
having
drawout
-
mounted
type
DB
,
DK
or
DA
air
circuit
breakers
is
completely
factory
assembled
and
tested
.
It
is
arranged
for
the
minimum
amount
of
labor
for
installation
.
See
Figs
.
1
and
2
.
Shipments
are
made
completely
assembled
or
in
sections
of
one
or
more
housings
to
suit
the
handling
facilities
at
the
point
of
installation
.
The
switchgear
consists
of
a
fixed
part
called
the
stationary
structure
,
and
drawout
-
type
circuit
breakers
called
the
removable
elements
.
The
switch
-
gear
provides
for
three
positions
,
"
operating
"
,
"
test
"
,
and
"
disconnect
"
,
of
the
removable
element
.
In
the
"
operating
"
position
,
both
the
primary
and
secondary
disconnecting
devices
are
engaged
,
and
the
circuit
breaker
is
ready
for
operation
.
In
the
"
test
"
position
,
only
the
secondary
discon
-
necting
devices
are
engaged
,
and
the
circuit
breaker
can
be
operated
without
energizing
the
power
circuit
.
In
the
"
disconnect
"
position
,
both
the
primary
and
secondary
disconnecting
devices
[
IT
-
1
-
-
V
-
*
3
saiga
.
»
•
-
i
i
n
"
js
I
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i
:
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.
•
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II
c
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t
;
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<
a
TG
.
2
.
•
oor
Weatherproof
House
and
Arranged
for
Throat
Connection
to
a
Power
Transformer
to
Form
an
Outdoor
Power
Center
Low
-
Voltage
Switchgear
Installed
in
an
Out
-
*
v
-
6
Courtesy of NationalSwitchgear.com

I
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
are
disengaged
and
the
entire
circuit
breaker
is
isolated
.
msi
SWITCHGEAR
HAVING
TYPES
DA
-
50
AND
DA
-
75
CIRCUIT
BREAKERS
Stationary
Structure
.
The
stationary
struc
-
ture
is
an
assembly
of
one
or
more
steel
housings
,
each
consisting
of
a
formed
and
welded
front
en
-
closure
containing
the
circuit
breaker
compart
-
ments
,
and
a
rear
enclosure
for
the
bus
copper
,
cables
,
instrument
transformers
and
other
detail
equipment
.
See
Fig
.
3
.
The
front
compartments
are
completely
enclosed
,
segregating
each
circuit
breaker
from
the
other
breakers
.
Each
circuit
breaker
compartment
is
provided
with
the
main
stationary
contacts
and
a
rail
along
each
side
for
supporting
the
removable
element
.
These
rails
permit
the
removable
element
to
be
moved
between
the
"
operating
'
'
and
"
disconnect
"
positions
,
with
a
positive
stop
for
each
position
,
and
by
use
of
the
rail
extensions
,
completely
out
of
the
compartment
.
Micarta
Bus
Supports
Arranged
for
Three
Bus
Bars
per
Phase
7
Courtesy of NationalSwitchgear.com

DESCRIPTION
«
Ci
STATIONARY
FOTO
OF
SECONDARY
LD
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ELEMEN
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STATIONARY
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OF
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•
DISCONNECTING
DEVICE
^
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DOOR
INTERLOCK
!
-
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V
*
7
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FIG
.
7
.
Compartment
for
Type
DA
-
50
Manually
-
Operated
Circuit
Breaker
GROUND
FINGERS
-
r
.
~
HUc
it
INTERLOCK
*
9
:
.
!
t
MOVABLE
^
/
PORTION
OF
/
PRIMARY
DlS
-
/
\
CONNECTING
DEVICE
TARGET
f
\
WHEELS
FOR
SUPPORTING
/
REMOVABLE
1
/
ELEMENT
.
ON
Y
COMPARTMENT
Ur
-
RAILS
*
•
f
-
±
*
L
P
LEVERING
DEVICE
m
t
/
i
4
MANUAL
TRIP
BUTTON
POSITIONING
STOP
!
i
ROLLER
ENGAGES
WITH
CLOSING
\
LEVER
IN
COMPARTMENT
DOOR
\
SOCKET
FOR
EMERGENCY
CLOSING
LEVER
FIG
.
6
.
The
rear
enclosure
is
made
up
ot
the
rear
frames
,
tie
members
,
top
sheets
and
rear
covers
,
all
bolted
together
and
to
tne
real
of
the
iront
compartment
,
xhe
rows
of
square
holes
which
are
punched
in
the
rear
frame
,
tie
memoers
.
and
the
rear
flange
of
the
front
compartment
permit
cnanges
and
additions
to
be
made
without
cutting
,
welding
or
drilling
.
The
universal
type
Micaria
DUS
support
blocks
can
be
arranged
to
permit
the
use
of
one
,
two
or
three
bars
per
phase
Thus
,
by
a
simple
re
-
ar
-
1
!
8
1
Courtesy of NationalSwitchgear.com

i
.
B
.
32
-
100
-
1
DESCRIPTION
L
.
V
.
METAL
-
ENCLOSED
SWITCHGEAR
rangement
of
the
insulating
blocks
,
additional
cop
-
per
bars
may
be
added
to
the
bus
in
the
held
as
future
load
requirements
dictate
.
Figs
.
4
,
5
and
6
illustrate
the
arrangements
of
the
Micarta
blocks
for
one
,
two
and
three
bars
per
phase
,
respectively
.
When
automatic
shutters
are
supplied
for
type
DA
-
75
circuit
breaker
compartments
,
they
close
and
isolate
the
fixed
portion
of
the
primary
dis
-
connecting
devices
when
the
removable
element
is
withdrawn
.
These
shutters
are
arranged
to
close
when
the
removable
element
is
approximately
half
withdrawn
from
the
cell
.
The
removable
ele
-
ment
consists
of
the
air
circuit
breaker
equipped
with
primary
and
secondary
disconnecting
devices
,
Removable
Element
.
L
’
AT
10
NARY
PORTION
OP
PRIMARY
DISCONNECTING
DEVICE
ROUND
?
I I
HOE
RAILS
FOR
SUPPORT
OF
REMOVABLE
ELEMENT
FOR
LEVERING
DEVICE
T
'
31
'
I
30
m
'
1
St
-
i
FDOOR
^
T
IsTAT
10
NAR
YlPORBONSOF
^
s
m
EDONDARY
-
DISCONNECTING
.
OEyiC
-
*
r
'
8
RACKET
FOR
4
POSITIONING
STOP
i
GROUND
FINGERS
TARGET
MANUAL
TRIP
BUTTON
SOLENOID
OPERATING
MECHANISM
AUXILIARY
SWITCH
CONTROL
RELAY
FIG
.
10
.
Courtesy of NationalSwitchgear.com